Record controlled interpreting machine



5 Sheets-Sheet l J. W. BRYCE RECORD CONTROLLED INTERPRETING MACHINE Filed June 7, 1941 IHHWIHHH.

March 7, 1944.

em WM 3 m m, m m m mm mm mm mm R mm 0 a 0 INVENTOR TTORNEY March 7, 1944.

Filed June 7, 1941 J. W. BRYCE RECORD CONTROLLED INTERPRETING MACHINE 5 Sheets-Sheet 2 INVENgfl M ATTORNEY March 7, 1944. J. w. BRYCE RECORD CONTROLLED INTERPRETING MACHINE Filed June 7, 1941 5 Sheets-Sheet 4 INVENTOR 1% BY Z mraww March 7, 1944. J. w. BRYCE RECORD CONTROLLED INTERPRETING MACHINE 5 Sheets-Sheet 5 Filed June 7, 1941 m JUT 4 w/ Mm E Q -4 g S R 0 \A M\ i w i s if TOR V FIG].

Patented Mar. 7, 1944 RECORD CONTROLLED INTERPRETING MACHINE James W. Bryce, Glen Ridge, N. J., assignor to International Business New York, N. Y., a corporation of New York Application June 7, 1941, Serial No. ssmos 6 Claims.

This invention relates to record controlled interpreting machines, and more particularly to such machines having provisions therein for checking the sensed data and the data to be recorded in order to prevent any recording operations whenever the data to be recorded fails to conform or correspond to the sensed data.

The present invention constitutes an improvement and modification of the interpreting machine disclosed and claimed in the copending application Serial No. 397,002, filed June 7, 19-41.

In the said copending application, provision is made for storing the sensed data, and comparing the intei'preting data recorded with the stored data to determine any failures of the recording operations to correspond to sensed data designa tions.

In the present application, the sensed data is stored in differentially settable members of tlie recording means before recording operations are effected. Checking means, controlled jointly by the sensing ,and recording means, are provided to determine the conformity of the data stored in the recording means and the sensed data. Upon determination of any disagreement between the sensed data and the data to be recorded, means are called into action for preventing any recording operations to be effected of the data stored inthe recording means.

Accordingly, an object of the present invention resides in the provision of an improved registering or recording machine including storing means for storing data to be recorded in accordance with the sensed data designations wherein checking means are jointly controlled by sensing means and the said storing means for permitting recording of the stored data when the sensed and stored data correspond, and for preventing recording of the stored data when the said data fail to correspond.

Other objects of the invention will be pointed out in the following description and claims and illustrated in the accompanying drawings, which disclose, by way of example, the principle of the invention and the best mode, which has been contemplated. of applying that principle.

In the drawings:

Fig. 1 is acentral section of the machine,

Fig. 2 is a sectional view taken at one side of the machine.

Fig. 3 is a view in side elevation showing in normal position the contacting means controlled by. the type bars.

Fig. 4 is a sectional view of one type of data receiving means.

Machines Corporation,

,said U. S. Patent 1,946,900, consequently, it is considered that the following brief description of the like elements, and their operations, is sllfiicient to comprehend the instant invention.

Record card feeding means Referring now to Figs. 1 and'2, the mechanism will be described for feeding individually record cards from a stack and transporting the cards successively past the sensing station, then to the recording station where the cards are held stationary, momentarily, during the recording operations, and thence to a card receiving hopper.

A main drive shaft I0 :is provided, which may be driven in any suitable manner, for example, by a motor M (Fig. 7) and a driving belt H, which shaft is enabled to drive shaft l5 through the worm gearing l3 and I 4. A box cam I5 is secured to shaft I5, which cam actuates the cooperating pivoted cam follower arm I! and arm I9 through the adjustable connecting rod 20.

Arm I 9 is secured to a shaft 2i having arms 22 (one of which is shown in Fig. 1) in pin and slot engagement with card picker 23 mounted for reciprocation in the frame of the machine. By means of the actuated shaft 2| and the reciproeating picker mechanism, record cards are advanced, one at a time, from the supply stack 24. Through gears 25 (Fig. 2), the shaft l0 drives a parallel shaft 26 which has threaded sections then momentarily are paused in their rotation to permit printing on each card in accordance with the preceding analysis.

This interruption in the advancement of the cards is accomplished as follows: Roller 34 is secured to a shaft 35 having attached at one end a gear 36 meshing with a gear 31 on shaft 38, on which shaft-is also secured a gear 39 driven by a mutilated gear 40 on the continuously rotated shaft l5. Thus, during the rotation of shaft H.

the gear will-pick npgea'r39 to advance each card to printing position, whereupon,- at this particular moment in the cycle of operation, the toothless portion of gear 40 moves into locking engagement with gear 39 as shown in- Fig. 2. Upon completion of the printing operations, gear 39 is again engaged for rotation, and each card is then fed forward to a conveyor comprising rollers l| and tracks 42, which convey'the ca-r'ds to a-suitable discharge hopper 43. The shafts upon which rollers 4| are secured are continually driven by the gear connections 44 to the shaft 26.

It shouldv be mentioned that a conventionaltype of card lever is provided between rollers 30 andthe sensing .station forcontrolling contacts 30a. These contacts are closed as long as cards arefed from the supply stack, by virtue of the engagement of the cards with the said card lever.

' Printing means a For effecting the printing on the record cards, as they successively pass through the machine, a plurality of type bars 45 (Fig. 1) are provided. 'I'hesebars are all mounted for reciprocation in the frame of the machine, and each have a connection. througha spring pressed pawl 45 to a crsshead'4'l. .Thus, in'Fig. 1,..upon movement of crosshead 4|,to.the,lef.t, the pawls 46, through- ,ends to blocks 48, slidable upon rods 49, and having pivoted link connections to a follower arm 5| pivoted at.52. Arm 5| has a roller 53 co operating with the cam groove of a box cam 54 mountedon a shaft 55 connected through worm gear 56 and worm 51 to the constantly running shaft in. The arrangement and timing of the parts issuch that they type bars 45 are advanced under the. influence of vpawls 46 synchronously with the movement of acard past the sensing brushes 3!. i

Ifa perforation at; say,.the 5 position on the card were under the sensing brushes, the corresponding .type representing 5 would be atthe printing line. I .The establishment of an electric circuit through the index point perforations by thebrushescauses a magnet 58 to be energized. There are a number of these magnets 58 corresponding to the different columns in the card.

each magnetbeing related to a corresponding type bar- 45.- The energizationof any magnet causes the release of a related pawl device 59 through a wire 6| and latch 62, and allow it'to engage-one of the ratchet teeth 50 on the bar 45. After-pawl 59 engages the teeth 60. further move ment of the type bar 45 to the left in Fig. 1 is prevented. The type bars 45 are positioned during the passage of a card pastthe brushes. Sub sequently, these type bars are held stationary a connection to a pivoted arm ID also actuates a -.restoring plate 1L In this manner, cam 63 moves ascases during the period that a card passes from'the analyzing station to printing position, and dur-. ing the printing operation. After the printing operation, pawls 59 and latches 52 are: positively restored in the following manner.

- Secured to shaft 55 is a cam 63 (Fig. 1) which cooperates with and actuates an arm 54 pressed upwardly by a spring 65 acting" through an arm 56 on shaft'fil. The shaft sl-hasan arm 68to I which is secured a restoring plate 69, and through plate 59 to the left, as viewed in Fig. 1, to restore pawls 59, and plate I upwardly to restore latches 62 and their connected wires 6 For each type bar 45 there is an individual hammer 12 which strikes the particular type 13 on the type bar at the printing line. The hammers are pivotally mounted on a rod 14 carried by a bar 15 and depend for their actuation upon movement of said bar. The bar 15 is pivoted on the frame of the machine, by means of pintles Fixed to one face of the cam i8 is a cam member 19 which cooperates with a projection 80 of the cam follower arm ll.

As the cam 18 revolves, by virtue of the shaft 55 being driven in the manner previously described, it cooperates with the arm 11 through its follower roller Ila, gradually retracting the hammers 12 in a counterclockwise direction against the tension of springs i6. As the roller Ila leaves the high point of the cam 18, member I9 engages the projection 80, and upon continued rotation of the cam, the projection 80 drops from the member 19, and the springs 16, thus released, turn the common bar 15, in a clockwise direction, to swing the hammers 12 against type 13, thus effecting printing.

It was mentioned hereinabove, that means are provided in the present machine for preventing the printing operations to be effected, whenever the checking means provided herein detect thatv .the differentially positioned type-bars, which in the instant case constitute the means for storing the data sensed on the records, are not in conformity with the sensed designations.

from being tripped in order to prevent printing of the data, which mechanism will now be 7 described. In Fig. 1, a bellcrank member 85 is loosely mounted on shaft 55, one arm 86 of which is normally disposed out of the path of the pro-. jection 80, the other arm 81, which is secured to armature 88 of the control magnet 89, nor-' counterclockwise direction, and thus, cause the arm 86 thereof to be disposed in the path of projection 86. Now, as the roller 11a leaves the high point of the cam 18, the projection is prevented from' dropping on the member 19, by means of the arm 86, which is disposed directly in the path of the said projection. In this mane nor, the common bar 15 is prevented from causing the hammers 12 to be directed against the type 13, and thus prevent any printing of the To this end, provision is made to prevent the hammers.

2,343,398- data set up on the differentially positioned typebars, to be effected. Upon continued rotation of the cam I8, the projection 80 is raised, and arm 86 is restored to the normal position, out of the path of the projection, by means of the action of spring 90.

In Fig. l, the reference character 8| designates a printing platen joumaled in the frame of the machine and adapted to be turned by frictional engagement with the passing card to prevent excessive wear at any one place. The inking ribhon devices are of conventional form and require no detailed description, the ribbon 82 being guided along the platen BI and beneath the record card. In Fig. 8, a portion of a perforated record card is shown with the interpreting data printed at the top of the card, and disposed at the head of each corresponding perforated column.

- It shouldalso be mentioned that a plurality Checking m ans The mechanism of the checking means, 'referred to hereinabove, for checking the conformity of the sensed data and data to be recorded will now be described. This means comprises generally a plurality of circuit closing units, one

unit or group being under control of the printing means. and the other unit or group being under control of the sensing means. The former will be described first.

With reference now to Figs. 1 and 3, each typebar 45 is provided with a contact making spring element 92 which normally, and in any differential position of the typebar, always engages the conducting strip 93; and, at a differential position of the typebar 45, the said spring element 32 also engages one of a series of conducting bars 94, depending upon the positioning of the typehar. The controlling functions of this circuit closing or reading unit for reading out the data values represented by the differentially positioned or settypebars will be explained later; in detail.

, With reference now to Figs. 4 and 5, the circuit closing unit under control of the sensing means will be described. In order to simplify this description, the unit chosen for illustrative purposes comprises part of the well known data accumulating means disclosed in U. S. Patents 1,965,979 and 1,976,617. Since the accumulation of data values forms no part of the present gization of the magnet its armature is attracted thereto, thereby releasing the lever I02, which is urged by the leaf spring I05, and causing the clutch element I to move into engagement with the cooperating teeth I06 which are integral with gear I01, the latter being loosely mounted on shaft IOI. Gear I01, when thus coupled to shaft IOI rotates gear I08 which meshes therei'fluigh, and effects displacement of an index wheel It is to be understood that the magnets may be energized at different points in the machine cycle, depending upon the times at which establishment of the 'contro1 circuits a sociated therewith are effected. The energization of these control circuits will be described in conjunction with the circuit'diagram. At the end of each data entry cycle a declutching operation is effected by suitable-control elements included in the unit and are described in greater detail in the said Patent 1,976,617. The rearward extremity of lever !02 is engaged, by a finger I I0 carried on a bar ill, at the end of each entry cycle for disengaging the clutch element I00 from teeth I05, and effecting relatching of the armature I03. With reference to Fig. 6, it is seen that the declutching operation referred to occurs approximately between the II and I2 machine cycle points.

Also driven by gear I0! is a gear II2 which is displaced in the same manner as the index wheel. Carried by and insulated from gear H2 is a. pair of electrically connected brushes H3, one of which is arranged to engage a single conducting segment H4 at the home position of the brushes, while the other engages an arcuate conducting strip II 5 (also see Fig. 7). the parts is such that when the index wheel I09 is in its zero or home position, one of the brushes is in contact with the conducting segment H4, and the other brush is in contact with the strip II5, thus forming an electrical connection between the two. An additional conducting segment II4a is provided and disposed adjacent to the said segment II4, so that upon displacement of the brushes II3 from the home position, the segment II4a is engaged thereby one cycle point later. The purpose of this arrangement will be understood as the description progresses.

The driving arrangement for shaft IOI in cludes a gear II6 (Fig. 2) secured to shaft III, which gear meshes with gear II'I. Integral with the latter is a gear II8 which meshes with gear II9. Secured to gear H9 is a small gear I20 which meshes with gear I2I securely mounted on shaft I22, the latter being the drive shaft of the unit, which is efiective to drive shaft IOI through the gearing I23 and I24.

Provision is made herein for automatically resetting the readout brushes II3 to the home position each cycle. Referring to Fig. 5, this mechanism is shown to be under control of a reset magnet I25. One of the gears, designated generally by the reference character I23 is secured to shaft I22, is effective to drive the shaft I26 through the gears I2'I and I28 (Fig. 4). The gear I28 has attached thereto a clutch disk I20 (Fig. 5), boththe clutch disk and gear being loosely mounted-on the said shaft I26. Attached to engage the clutch notch I36 in the constantly rotating clutch 'disk I29, thereby causing the shafts I25 and I 34 to be rotated to effect resetting of the brushes II3 tothe home position, in a The relationship of manner-wellrknowninthe art; and described in detail inthe-said'Patent1,976,617. "Mochineoperations Starting cirmtz'ts.-- Referring now to Fig. 7,

with the line switches S closed, and ,upon de-' pressionofthe start key.--SK, a circuit is comthe ,supply stack to the sensing and printing stations. Upon advancement ofthe first and to the printing position in timed relationship with the passage of the'index point positions past the sensing brushes. Therefore, upon sensing a 2'? perforation in one column'on the card, the mag net"58 is energized to release the pawl 59 to cause the related typebar to stop with the "2" type element opposite the printing position. Also, the

- related contact springelement. 92 is positioned to following-cards from the supply stack the contacts= 30a are closed, as.indicated in Fig. 6, to cause energization of relay R2, and consequently the closure ofcontacts RZa.

Another holding circuit for relay RI .can bev traced from conductor I40 to cam contacts CCI, contacts RZaand RIa to coil of relay RI, motor M and conductor I42." So long as cards are fed to the machine, this latter holding circuit permits continuous machine operations, since this circuit shunts the camcontacts CO4, which open during the first. part :of each machine cycle.

Still another holding circuit is provided to shunt the cam contacts CCI, the latter opening during the latter partof each machine cycle. Provision is made whereby contacts R4a are closed at the time contacts CCI open, whenever the checking operations indicate that the data set up in the printing means is in accordance with the data sensed onthe records; thus, a circuit can be traced from conductor I40 to normally closed contacts I43 of the stop key S'I'K, contacts R4a,'R2a, and Rla to the coil of relay RI, motor M and conductor I42.

Therefore, so long as records are fed to the machine, and so long as the set up data in the printing means is in agreement with the sensed data-to'eiiect the closure of contacts R4a, during the latter part of the machine cycle, the. operations of the machine are not interrupted. However, upon disagreement of the data stored or set up in the printing means and the sensed data, contacts R4a are caused to be opened, to efiect interruption of further machine operations, by breaking the described holding circuit.

Interpreting and checking" circuita-Now, as the cards are advanced to the sensing station, the brushes 3| and conducting roller 32 are effective to complete circuits to the connected printing control magnets 58 at the differential times, in

the first half period of the machinecycle, theperforations in the record cards are'presented to the said brushes and roller. A typical circuit complete an electrical connection between the conducting strip 93 and the 2" conducting bar 9 I 1 At the same time-magnet" 58 is energized, a"

circuit is completed from the said sensing brush by-the plug .connectingconductor I45 to the coil of magnet I04 to efiect energization of this magnet, and in turn cause the related brushes H3 to be displaced. Again, assuminga 2" perforation being sensed, the magnet I04 is energized at this time in the cycle (namely, the 4 machine index point, see Fig. 6)- to eflfect the described clutching'operation.

' In Fig. '7, it is seen, that the conducting segments H4 and -II4a are connected to the conducting segments of an emitter or commutator device El, and theindividual conducting bars 94 are connected to individual conducting segments of a second emitter device-E2. the emitter brushes BI and B2 is clearly indicated in the timing chart shown in Fig. 6. The said emitter brushes are arranged to engage the associated conducting segments one and a quarter cycle-points after the corresponding index point positions of the cards have passed the sensing can be traced from conductor I40 to contacts 30a and CB (see Fig. 6), conducting roller'32, brush 2i, plug connecting conductor I44, magnet 58,

and cam contacts CCI to conductor I42, energizing said magnet at the time in the cycle the perforation is sensed.

' In this machine, the cards are fed so that the top edge of the card as shown in Fig. 8, is the leading edge, 1. e., the index point positions are presented to the sensing station in the 0, 1, 2, 3, etc. order. It was mentioned hereinabove' that thetype elements of the typebars are advanced brushes. For example, upon sensing a 2 per- {oration in a column in the card, the magnets I04 and 58 are energized at this time in the machine cycle. As mentioned before, a clutching operation is effected to cause the related brushes M3 to be displaced, and the related typebar is stopped to present the "2 type to the printing position and also to displace the contact spring element 92 to engage the 2 conducting bar 94. Now, one and a-qu'arter cycle points later, the

. brush B2, for example, of emitter E2 will engage the conducting segment thereof connected to the 2 conducting bar 94. Similarly, the brush Bl, of emitter EI, will engage the third conducting segment thereof, which segment is connected bya common conductor to the conducting segment 4a, the latter at this moment being engaged by the displaced brushes I I3.

It is -remembered, that the magnet 58 is energized at the time a "2 perforation is sensed. Approximately an eighth of a cycle point lag is assumed for eflecting a clutching operation to cause the related brushes to be displaced. Thus,

one of the brushes I I3 will start-to engage'the conducting segment I-I4a, one and an eighth cycle points after the said magnet I04"is energized. Now, as the brush Bl engages the third segment of the emitter one and a quarter cycle points after the said magnet I04 is energized, the said brush H3 is still in engagement with the said segment 4a 50 that the following typical circuit can be completed: Conductor I40, brush BI and the third conducting segment of emitter EI, conducting segment II4a, brushes H3, conducting ring II5, plug connecting conductor I46, pick-' up coil of relay R3, plug connecting conductor I41, conducting strip 93, contact'spring 92, the

2 conducting bar 94, the third conducting seg-' ment and brush B2 of emitter E2 to conductor I42, energizing the said relay. Relay R3 is provided with a holding coil which is energized upon closure of the contacts R3a. as follows: Conduc-' The timing-oi? tor 14G, cam contacts CCZ, contacts R3 a, holding coil of relay R3 to conductor I42. This holding circuit is maintained until contacts CO2 open near the end of the cycle,

It is understood of course, that a relay R3 and associated circuit connections are provided, for each column of data to be printed. Thus, it is seen, that, whenever the data set up in the printing unit corresponds to the sensed data, the corresponding relays R3 are energized. With all the R3 relays energized,'a circuit is established,

later in the cycle, when cam contacts CC3 close,

to complete a rcUit from conductor I40 to cam contacts C03, the series connected contacts R31) to coil of relay R4'and conductor I42, energizing this relay to cause its contacts R4a to close, and R411 to open. Contacts R4a being closed, at the time cam contacts CC! are Opened permits the holding circuit for relay Rl to be maintained, thus permitting further continuous operations of the machine, and contacts R41) being opened, at the time cam contacts CC6 are closed, prevents a circuit from being completed to magnet 89.

It is recalled that energization of magnet 89 causes the suppression of any printing operations, but so longas magnet 89 remains deenergized printing operations areeffected. Thus, it is seen that whenever the data stored in the printing unit corresponds to the sensed data, the corresponding relays R3 are energized by means of the described checking circuits, and so long as these relays are energized to permit a circuit to be completed to relay R4, at the proper time in the cycle, the data stored in the printing unit is recorded in the manner described hereinabove. b Whenever yone of the relays R3 is not energized, indicating that the sensed data and the data set up on the typebars fail to conform, relay R4 is not energized. For this condition, magnet 89 is energized. upon'closure of cam contacts C06,

to cause the arm 86 to be disposed in the path of the projection 80, and thereby prevent the tripping of the printing hammers. Thus, the data represented by the differentially positioned typebars are not recorded. Further automatic machine operations are prevented too, by virtue of the opened contacts R4a, which prevent the holding circuit for relay Rl to be completed, upon opening of cam contacts CCI.

Further detailed description of the checking circuits is not believed necessary, in view of the detailed explanation in conjunction with a specific example. The checking circuits are completed, similarly to eflect energization of all the relays R3, whenever the sensed data correspond to the data set up in the difierentially positioned typebars.

It should be mentioned, that during each cycle, upon closure of cam contacts CC the reset magnet l25 is energized to efiect the described resetting operations, so that the brushes H3 are reset or returned to the home position indicated in Figs. 4 and '7 In this manner, the interpreting operations can be checked to determine whether or not the data stored in the printing unit and the sensed data correspond. The data stored in the printing unit is read out at differential times in the cycle to complete the checking circuits at the same times that the brushes H3, which are under the control of the sensing brushes, complete other parts of the said checking circuits to effect energization of the checking control relays R3. Then, at a later time in the cycle, the control magnet 89 for the printing hammers prevents pr permits the printing of. the stored data, depending upon whether or'not the stored data is "in agreement with the sensed data. I 7

,While there has been shown and described and pointed out the fundamentalnovel features of the invention as applied to a'sin'gle modification it will be understood that various omissions and substitutions and changes in the form and details of the device illustrated and in its operation may be made by those skilled in the art, without departing from the spirit of the invention. It is the intention, therefore, to be limited only as indicated by the scope of the following claims.

Whatis claimed is:

'1, An interpreting machine controlled by records bearing data designations having means for, recording the i rpr n data on'the related records, means for sensing the data designations on the records, means for feeding the records, one at a time, and transporting them flrst to the sensing means and then to the recording means, said recording means-including settable elements and means controlled by. the sensing means for differentially positioning the said'elements in accordance with the sense'ddesignations, settable circuit closing means positioned by the diflferentially positioned elements, additional settablecircuit closing means having means controlled by the sensing means for controlling the positioning of the litter in accordance with the sensed designations, a control circuit including both the said circuit closing means and a control device, means operated in timed relationship with the feeding means for effecting energization of the said control circuit whenever both of the said positioned circuit closing means represent the same data, and error manifesting means controlled by said control device.

2. A cyclically operable recording machine controlled by records bearing data designations, comprising means for sensing the designations on individual records during each cycle of operation of the machine, recording means including settable elements and means controlled by the sensing means at differential times in the cycle for differentially positioning the said elements in accordance with the sensed designations, additional means controlled by the sensing means at diifer- 'ential times in the cycle for representing the controlled by said checking means and rendered effective during the said cycle for manifesting an error when the data represented by the positioned elements and the representing means fail to conform.

3. A recording machine controlled by records bearing columns of data designations, comprising means for sensing the said columns of data designations, recording means including settable elements, one for each column of data to be recorded, and means under control of the sensing means for differentially positioning the elements in accordance with the sensed designations, additional means under control of the sensing means for representing the columns of sensed data designations, a plurality of control circuits, each including a control device, one for each column ofs-data to be recorded, means jointly controlled by the saiddifierentiallypositioned elements and said additional data representing means for controlling the completion or said control circuits, and error manifesting means controlled by said control device.

4. A cyclically operable recording machine controlled byrecords bearing data designations comprising means for sensing the designations on individual records during each machine cycle, recording means including 'settable elements and means controlled by the sensing means at dinerential times in each cycle for difierentially positioning the said elements in accordance with the sensed designations, contact means controlled by the differentially Positioned elements, additional contact means having, movable means controlled by the sensingmeansat the differential times the designations aresensed each cycle for re resenting the sensed designations, circuit means, including a control device means including .both the said contact'meansfor controlling the energization of the saidcircuit means, at differential times in each cycle, immediately after the data designations are sensed; and error manifesting means controlled by said control device.

5. A recording machine controlled by records bearing data designations comprising means for sensing the data designations on the records,

data designations, means the said, setting up means recording means including means und r ontrol of: the, sensing means for setting up the" data to be: recorded, additional mean underi control of the sensing means for representing the sens d jointly controlled by and said additional means for determining. the conformity-0f the data set up in the recording means and the representing means, and error manifesting means controlled by said determining means.

6. A recording machine controlled by records 'bearingdata designations comprising means for sensing the data designations on the. records. recording means including means under control of the sensing means for storing the data to be recorded, a plurality of circuit closins'lmi s, n of said units having means controlled by the sensing means in accordance with the sensed designations for representing the latter, and the other of said units having means controlle 'b the data storing stored data, circuit means jointly c t ll y means in accordance with the both the said units for determining the correspondence of the data represented by both the said units and including control means energized in dependence upon said correspondence, and

error manifesting means controlled by saldcom trol means.

JAMES W. BRYCE.

CERTIFICATE OF CORRECTION. Patent No. 2,5h5,59a. March 7,=19hu.

JAMESL enymr It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 6, first column, line 6, claim 5, for "device" read --devi ces Jointly"; and that the said Letters Pete nt should be read with this correctiontherein that the same may conform to the'record of the case in the Patent Office. signed and sealed this 50th day of may, A. n. 19th.

Leslie Frazer (Seal) Acting Commissioner of Patents.

CERTIFJQICATE OF CORRECTION. Patent No. 2,315,398. March 7, i 19%.

.mmss w. BRYCE.

It is hereby certified that error appears in the printed specification ofthe above munbered patent requiring correction as follows: Page 6, first column, line 6, claim 3, for "device" read "devices jointly--; and that the said Letters Patent should be read with this correctiontherein that the same may conform to the'record of the case in the Patent Office.

Signed and sealed this 50th day of May, A. D. 191411..

LealieFrazer (Seal) Acting Commissioner of Patents. 

